1.  Questions : How is D related to A ?
Statements :

I.  B is the brother of A ?
II. B is D's son.

A. I alone is sufficient while II alone is not sufficient.
B. II alone is sufficient while I alone is not sufficient.
C. Either I or II is sufficient.
D. Neither I nor II is sufficient.
E. Both I and II are sufficient.

Answer: Option D

Explanation:

From I and II we conclude that A is either son or daughter of D.